Home / 21,355.75-29,472.08-12,281.00

Finding the Fourth Proportional to 21,355.75, 29,472.08 and 12,281.00

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Solution

The fourth proportional to 21,355.75, 29,472.08 and 12,281.00 is: 16,948.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,355.75 : 29,472.08 = 12,281.00 : x
  2. Step 2: Convert to fraction form
    21,355.75/29,472.08 = 12,281.00/x
  3. Step 3: Cross multiply
    21,355.75x = 29,472.08 × 12,281.00
  4. Step 4: Simplify right side
    21,355.75x = 361,946,718.86
  5. Step 5: Solve for x
    x = 361,946,718.86/21,355.75
  6. Step 6: Final answer
    x = 16,948.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.